I've decided to make a new menu interface for my mods (not HoLv3.1 particulary but in general).

It will be an optional instalation ofcourse. For background I chose to use ONLY parts of the paintings of Boris Vallejo (as a tribute to this great fantasy artist). So far I have prepared only the "New Game" screens:

So what do you think?
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Not idly do the leaves of Lorien fall.

Thanks, I'll see what I can do. Later on I'll try and make the main menu as well. Since you have some experience on the matter I may ask for some tips (about the credits and so on).
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Not idly do the leaves of Lorien fall.

If you are refering to the Pirate faction that isn't downloadable yet. It appears on the Crimson Tides expansion which I plan to release on the 7th of June.
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Not idly do the leaves of Lorien fall.

I guess so. You can always try adding WOG options (in addition to the obligatory ones) and see how it goes.

How to install def packs?

The def packs are animations for creatures that appear in my mod. They are already in use. I posted them in case someone wants to use them without installing my mod. To replace an existing creature def you need MMarchive. See the introduction on modding tutorial here in HC.

In my humble opinion longbowmen is way too strong unit. Castle and Tower can now have practically a shooting army which makes them overpowered.

Castle's units have already been rebalanced in HoL v3.1 and longbowmen strenght has been diminished. Still Castle remains the most powerfull faction. As for the army of shooters, Haven can have an army of fliers which can easily block an army of shooters. A well balanced army can't rely on shooters only. It needs ground units as well.

EDIT:

By the way, I chose a Main Menu background. What do you think? I will make the buttons with clear backgrounds so that they will fit to any background but I think I'll keep this one.

As I said, I will make the buttons background cyan and thus they will fit on any background. Maybe a more PG13 one like this?

@Zeki

I don't know what it could be. Now and then there are users that say that have ERM syntax errors but the game runs OK. If that is the case with you as well then ignore it.
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Not idly do the leaves of Lorien fall.